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(mman.) V l V. RL CHAMBERLIN.

WINDOW SCREEN.

Patented Nov. 6, 1883.

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N, PETERS. Pmmumognph-n www. n c. A

VOLNEY E. GHAMEEELIN,

E GAMBETDGE, MnSSAcHUsETT-s, nssienon To FRANCIS L. HEWLETT, OF SAME PLACE.

WINDOW-SCREEN.

SPECIFICATION formingpart of Letters Patent No'. 288,1`60rdated November 6, 1883.

Application filed April 7, 1883. (No model.)

To @KZ whom it may concern Be it known that I, VoLNEY R. CHAMBER- LIN, of Cambridge, in the county of'Middle-` ser and State of Massachusetts, have invented Y Y new and useful Improve-ments in W'indow- Screens, which will, in connection with the accompanying drawings, be hereinafter fully described, and specically defined in the appended claims.` p l1o This invention relates to that cla-ss ofscreens which are employed in conjunction with the sash and glass oi' windows when the latterare partially opened, and the screen is used to close against insects the space which is created by the openingof the sash; andthe invention consists of divers new devices and the combination thereof, as will be explained. Y

In said drawings, Figure l is a side elevation of a window-screen embodying my im- 2O` proyements. Fig. 2'is a detached YView showing a part of a screen, with the extension-bar closed against the screen-frame. Fig. 3 is a detached View AYshowing the screen-frame Vin section and the extension devices in elevation. 2 5 Fig. fi is a detached elefation, showing my improved extension-bar as telescoped. Fig. 5 is a 1View like Fig. a, except that the bar is shown as extended. Fig. 6-is atransverse View taken on line A A, Fig. 4. Fig. 7 is asectional ele- 30 ration, showing the screen in position for use,

with the lower sash partly raised and a nietallic strip to close the spacebetween the meet` ingrail ofthe upper sash. and the glass in the lower sash. Fig. 8 is au enlarged detached 3,5 View, showing parts of Fig. 7 Fig. 9is a secy tion of my metallicstrip shown in perspective. Heretofore the lip `of the extension-bar has been seated in a rabbet in the main frame sicn or expanding springs of the extension-bar have heretoforebeen arranged in a tube, which served as the support ofthe bar; but such tube isliable, by the accumulation of dirt, to bind, 5o so as to resist the force of the spring. f To obapplied to eitherthe longer or shorter sides of ,L

the frame, as the width of windows may render necessary, thereby rendering the same bar 6o Y available in places where otherwise bars of various lengths would be requisite. I also employ, in combination with my improved screen,

a strip of metal, to close the space between the glass in the lower sash and the meeting-rail of the upper sash.

In said views, a c represent the rails of the longer sides of the screen, and b represents the shorter rails, which longer and shorter rails are of equal and uniform thickness, as shown 7o in Fig. 3, and are united and secured together at the intersecting angles in any desired manner. The extension-bar c is formed with a lip, Lasshown in Fig. 3, the interior trans- Verse line of said bar being equal to the thickness of the screen-frame, while the outer line is equal to such interior line and thethickness of lip d added thereto. As lip d oyerlies the frame a b, therefore the extensionbar can be moved laterally to any extent within its limits 8o of adjustment without changing the appearance of the frame, and as the frame is iiush in all its parts on the side opposite said lip, therefore the frame can be so arranged that the sash can, when raised or lowered, move at all times 8 5 close to the screen-frame, land yet leave no passage for insects. For the purpose of supporting bar c in position and guiding the saine when being adjusted, I secure therein a short rod, g, as shown in Fig. 3, (the saine being 9otaken as on line B, Fig. 1,) and on said rod I mount the expanding-spring h, which by its thrust action -will hold the bar against the way onwhich the screen is supported. For the purpose of rendering said bar telescopic, I form it in two sections or parts, as is clearly shown in Figs. 4 and 5, one being formed with a tenon, e, and the other with a mortiseto receive the same, said tenon being preferably formed with thicker and thinner sections, and Ico f esame.

that portion of the mortise which receives the thicker portion having for one of its sides the lip d, as shown in Figs. 4, 5, 6. Saidsections are held in proper relative positions, when ad- 5 justed, by screws, as shown in Figs. 4, 5, 6, and the advantage of such telescopic adjustment, as already explained, consists in the fact that the same bar may be employed for either the longer or shorter side of the screen, as the 1o size ofthe window may require, and such extension affords no facility for ingress of insects, and for the purpose of preventing them 'from crawlingbetween the meeting-rail j of the upper sash and the glass Zof the lower sash, when 15 the latterris raised and the screen is of less height than the lower sash, I employ a thin Vstrip, k, of metal, ,longitudinally bent, as v shown, and secured to rail j, as shown in Figs. 7 and 8. Said strip is of such thinness that 2o when bent in its cross-section, as shown, and secured in place, it can be readily adj usted to the glass Z by pressure of the finger, and will then admit ofthe free raising and lowering of the lower sash, but will prevent iiies or other 25 insects from entering the room at that point.

I am fully aware of United States Patents Nos. 235,810 and 101,285, and Iclaim nothing that is described, claimed, or shown therein,

my invention in the matter of closing the space between the meeting-rail of the upper 3o frame, substantially as specied. 4o

2. The extension-bar c, formed in two parts or sections, and to be adjusted at varying lengths, by means and for the purpose substantially as specified.

3.y In combination with a window-screen 4 5 constructed and arranged to: form a close joint with the lower sash,vthe angle-plate k, constructed and adapted tobe secured to meeting-y rail j and to close the space between the same and the glassZ of the lower sash when the sash 5o is raised, substantially as specified.

VOLNEY R. CHAMBERLIN.

Vitnesses: K

EUGENE HUMPi-IREY, Criss. S. GooDiNG. 

